javascript - D3js：我可以将刻度数更改为可变天数吗？

Question

我想根据动态数据（csv）更改刻度之间的天数。我发现的所有示例似乎都使用了一组固定的日期。

var outerWidth = 600;
var height = 200;
var margin = {
  top: 40,
  right: 40,
  bottom: 60,
  left: 40
};
var parseDate = d3.time.format("%Y-%m-%d").parse;
var formatDate = d3.time.format("%b %d, '%y");
var x = d3.scale.ordinal().rangeRoundBands([0, outerWidth], 0.1); // 0.05
var scaleticks = 5;
var y = d3.scale.linear().range([height, 0]);
var xAxis = d3.svg.axis()
  .scale(x)
  .orient("bottom")
  .tickPadding(8)
  .ticks(scaleticks)
  .tickFormat(d3.time.format("%m-%d"));
var yAxis = d3.svg.axis().scale(y)
  .orient("left")
  .ticks(10);
var svg = d3.select("#cases").append("svg")
  .attr("width", outerWidth + margin.left + margin.right)
  .attr("height", height + margin.top + margin.bottom)
  .append("g")
  .attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var data = [{
    "date": "2020-08-01",
    "deaths": "0"
  },
  {
    "date": "2020-08-02",
    "deaths": "1"
  },
  {
    "date": "2020-08-03",
    "deaths": "0"
  },
  {
    "date": "2020-08-04",
    "deaths": "1"
  },
  {
    "date": "2020-08-05",
    "deaths": "0"
  },
  {
    "date": "2020-08-06",
    "deaths": "1"
  }
]
data.forEach(function(d) {
  d.date = parseDate(d.date);
  d.value = +d.deaths;
});
x.domain(data.map(function(d) {
  return d.date;
}));
y.domain([0, d3.max(data, function(d) {
  return d.value;
})]);
svg.append("g")
  .attr("class", "x axis")
  .attr("transform", "translate(0," + height + ")")
  .call(xAxis)
  .selectAll("text")
  .style("text-anchor", "end")
  .attr("dx", "-0.8em")
  .attr("dy", "-0.55em") //.55
  .attr("transform", "rotate(-65)");
svg.append("g")
  .attr("class", "y axis")
  .call(yAxis)
  .append("text")
  .attr("transform", "rotate(-90)")
  .attr("y", 6)
  .attr("dy", ".71em")
  .style("text-anchor", "end");
svg.selectAll("bar")
  .data(data)
  .enter()
  .append("rect")
  .style("fill", "red")
  .attr("x", function(d) {
    return x(d.date);
  })
  .attr("width", x.rangeBand())
  .attr("y", function(d) {
    return y(d.value);
  })
  .attr("height", function(d) {
    return height - y(d.value);
  });

<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.17/d3.min.js"></script>
<div class="rtecenter" id="cases">&nbsp;</div>

标签： javascriptd3.js